US4744450A - Device for maintaining a clutch release bearing in contact with a clutch cover assembly at all times - Google Patents

Device for maintaining a clutch release bearing in contact with a clutch cover assembly at all times Download PDF

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Publication number
US4744450A
US4744450A US06/737,427 US73742785A US4744450A US 4744450 A US4744450 A US 4744450A US 73742785 A US73742785 A US 73742785A US 4744450 A US4744450 A US 4744450A
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US
United States
Prior art keywords
clutch
lever
release bearing
sector gear
cover assembly
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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US06/737,427
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English (en)
Inventor
Patrice Bertin
Rabah Arhab
Yvon Sevennec
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Valeo SE
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Valeo SE
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Publication date
Application filed by Valeo SE filed Critical Valeo SE
Assigned to VALEO reassignment VALEO ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: ARHAB, RABAH, BERTIN, PATRICE, SEVENNEC, YVON
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Publication of US4744450A publication Critical patent/US4744450A/en
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Expired - Lifetime legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D28/00—Electrically-actuated clutches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
    • F16D23/00—Details of mechanically-actuated clutches not specific for one distinct type
    • F16D23/12—Mechanical clutch-actuating mechanisms arranged outside the clutch as such

Definitions

  • the present invention concerns a device for maintaining a clutch release bearing in contact with a clutch cover assembly at all times.
  • a clutch release bearing is actively operative on the clutch cover assembly at the time of the operation to disengage the clutch but is generally spaced from the assembly by a small distance, called the clearance, in the clutch engaged position. It has been noted that it is often advantageous to eliminate this clearance and to provide for the clutch release bearing to bear on the clutch cover assembly under all circumstances, including when the clutch is engaged, in order to procure gentler and more effective operation, with reduced wear of the various component parts of the clutch and the release bearing.
  • the present invention is more particularly concerned with a device for maintaining a clutch release bearing in contact with a clutch cover assembly at all times when the release bearing is power-operated, the operating system comprising an actuator and coupling means between the actuator and a release bearing operating shaft, the coupling means comprising gear means driven from the actuator and meshing with a toothed sector associated with the operating shaft.
  • An object of the present invention is a device of the aforementioned kind which operates excellently under all circumstances, without excessive fatigue affecting the various parts which constitute it, and of simple and rugged construction.
  • the present invention consists in a device for maintaining a clutch release bearing in contact with a clutch cover assembly at all times, comprising a clutch release bearing operating shaft, an actuator, means coupling said actuator to said clutch release bearing operating shaft including gear means driven by said actuator and a toothed sector meshing with said gear means rotating freely on said operating shaft, a lever fast with said operating shaft, thrust means implemented with play through the intermediary of which said toothed sector cooperates with said lever, and elastic means for presetting the force with which said clutch release bearing bears on said clutch cover assembly when the clutch is engaged disposed between said toothed sector and said lever to increase said play of said thrust means.
  • the travel of the elastic means is reduced and significantly shorter than the release travel, conferring excellent endurance on the elastic means.
  • these means may in this way be conveniently incorporated into the power-operated device for releasing the clutch.
  • the toothed sector comprises a peg and the elastic means comprise a torsion spring wound round said peg with respective ends cooperating with the toothed sector and the lever. In this way a rugged and compact structure is obtained.
  • the thrust means comprise a projection on the toothed sector and the lever comprises a bearing surface on which the projection bears.
  • the thrust means implemented with clearance advantageously comprise a pawl for compensating wear pivoted to the toothed sector and the lever comprises a toothed portion with which the pawl cooperates.
  • a spring is preferably provided to hold the pawl engaged with the toothed portion of the lever and a fixed bearing surface raises the pawl when the clutch is engaged, against the action of the aforementioned spring, so as not only to activate the elastic means but also to compensate for wear.
  • FIG. 1 a schematic view showing a clutch, its clutch release bearing and the power-driven operating system for the clutch release bearing with a device in accordance with the invention for maintaining the clutch release bearing in contact with the clutch cover assembly at all times.
  • FIG. 2 is a view to a larger scale of the clutch release bearing operating system and the contact maintaining device, shown in the clutch engaged position.
  • FIG. 3 is a corresponding view in cross-section on the broken line III--III in FIG. 2.
  • FIG. 4 is a view analogous to FIG. 2 but in the clutch disengaged position.
  • FIG. 5 is a view analogous to FIG. 2 but in which the continuous contact maintaining device is combined with a wear compensator.
  • FIG. 6 is a corresponding view in cross-section on the broken line VI--VI in FIG. 5.
  • FIGS. 7, 8, 9 and 10 show the operation of the device in FIG. 5, FIG. 7 showing the clutch when new and engaged, FIG. 8 showing the clutch when new and disengaged, FIG. 9 showing the clutch when worn and engaged and FIG. 10 showing the clutch when worn and disengaged.
  • FIG. 11 relates to an alternative embodiment.
  • FIGS. 1 through 4 illustrates, by way of non-limiting example, an application of the invention to the operation of a diaphragm clutch, in particular for automobile vehicles.
  • the clutch (FIG. 1) comprises a cover 10 adapted to be fastened to the flywheel 11 of the motor of the automobile vehicle.
  • This flywheel 11 constitutes a reaction plate.
  • the clutch further comprises a friction disk 12 which is coupled to the primary shaft 13 of the gearbox of the automobile vehicle.
  • the disk 12 is adapted to be clamped between the reaction plate 11 and a pressure plate 14, as a result of an elastic clamping force applied by a diaphragm-shaped spring 15.
  • the diaphragm spring 15 bears on the cover 10 at 16 and features in its central region fingers 17 adapted to be pushed towards the left in FIG. 1 by a clutch release bearing 18 when it is required to alter the clutch from the engaged state shown in FIG. 1, in which the release bearing 18 has no significant effect on the diaphragm spring 15, to a disengaged state in which the release bearing 18, by pushing on the diaphragm spring 15, removes the clamping force from the pressure plate 14, which releases the friction disk 12.
  • the operating system for the release bearing 18 is power-driven and comprises an actuator 19 (FIG. 1), an electric motor in this instance, the shaft 20 of which has one end formed as a lead screw 21 (FIG. 2).
  • the operating system for the release bearing 18 also comprises an operating shaft 22 and a yoke 23 which is fast with this shaft 22.
  • the operating system for the release bearing 18 further comprises coupling means between the lead screw 21 and the operating shaft 22.
  • These coupling means comprise gear means formed, in the example shown, by two gear wheels 24 and 25 fastened together.
  • the gear wheel 24 meshes with the lead screw 21 so as to be driven by the motor 19 and the gear wheel 25 meshes with the teeth 26 of a toothed sector 27.
  • This toothed sector 27 associated with the operating shaft 22 is mounted to rotate freely about the shaft 22 at 27A (FIG. 3).
  • the toothed sector 27 cooperates with a lever 29 through thrust means 28 implemented with play.
  • the lever 29 is fast with the operating shaft 22.
  • Elastic means 30 are provided for presetting the force with which the clutch release bearing 18 bears on the clutch cover assembly in the clutch engaged position and are inserted between the toothed sector 27 and the lever 29, being operative in the direction which tends to increase the play of the thrust means 28.
  • these elastic means comprise a torsion spring 30 which is wound round a peg 31 on the toothed sector 27 and the respective ends 32 and 33 of which cooperate with the toothed sector 27 and the lever 29.
  • the thrust means 28 implemented with play comprise a projection 34 on the toothed sector 27 adapted to bear on a bearing surface 35 on the lever 29.
  • the device comprising the thrust means 28 implemented with play and the spring 30 maintains the clutch release bearing 18 in contact with the diaphragm spring 15 of the clutch cover assembly at all times, with a simple and rugged construction particularly well suited to power-driven operation of the release bearing 18.
  • the spring 30 is of small overall dimensions and has a small working range since this corresponds only to the play 28, which is very small. Consequently the spring 30 is not subject to wear and features excellent endurance throughout the service life of the device.
  • FIGS. 5 through 10 An alternative arrangement (FIGS. 5 through 10) is analogous to that which as just been described with reference to FIGS. 1 through 4 and the same reference numbers have been used in both cases, but the thrust means 28 implemented with play in this instance comprise a wear compensating pawl 36 which is pivotally mounted on the toothed sector 27 at 37 and which cooperates with teeth 38 formed on the lever 29.
  • a spring 39 maintains the pawl 36 engaged with the teeth 38 on the lever 29.
  • the pawl 36 is raised by a fixed bearing surface 40 in the clutch engaged configuration of the clutch cover assembly not only to activate the continuous contact elastic means but also to compensate for wear.
  • FIG. 7 shows the position of the device when the clutch is new and in the engaged configuration.
  • the pawl 36 is raised by the fixed bearing surface 40 and the spring 30 exerts an elastic force which maintains the release bearing 18 in contact with the diaphragm spring 15 at all times.
  • FIG. 8 shows the clutch when new but in the disengaged configuration.
  • the pawl 36 has left the fixed bearing surface 40 and is engaged with the teeth 38 on the lever 29.
  • the toothed sector 27 and the lever 29 form an integral unit which operates on the release bearing 18 to achieve disengagement.
  • FIG. 9 the clutch is shown in the engaged configuration, as in FIG. 7, but is in the worn rather than the new state.
  • the operation is the same.
  • the position of the pawl 36 relative to the teeth 38 on the lever is shifted towards the right in FIG. 9 as compared with the position in FIG. 7.
  • FIG. 10 the clutch in the worn state is shown in the disengaged configuration and the operation is analogous to that which has been described with reference to FIG. 8.
  • the sector 27 and the lever 29 form a block which operates on the release bearing 18 to disengage the clutch.
  • FIG. 11 Another arrangement (FIG. 11) is analogous to that which has just been described with reference to FIGS. 5 through 10, but the lever 29 is in two parts 29A and 29B of which one 29A is fastened to the operating shaft 22 and the other 29B carries the teeth 38.
  • the two parts 29A and 29B are linked together by two joints one of which 41 is without play and the other of which 42 features radial play, so that the range of movement of the part 29B is greater than that of the part 29A.
  • the spring 30 cooperates with the part-lever 29B having the greater range of movement, which provides for a very high degree of precision in operation.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mechanical Operated Clutches (AREA)
US06/737,427 1984-03-28 1985-05-24 Device for maintaining a clutch release bearing in contact with a clutch cover assembly at all times Expired - Lifetime US4744450A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8408324 1984-03-28
FR8408324A FR2564921B1 (fr) 1984-05-28 1984-05-28 Dispositif pour maintenir en permanence une butee de debrayage en appui sur un mecanisme d'embrayage

Publications (1)

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US4744450A true US4744450A (en) 1988-05-17

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ID=9304456

Family Applications (1)

Application Number Title Priority Date Filing Date
US06/737,427 Expired - Lifetime US4744450A (en) 1984-03-28 1985-05-24 Device for maintaining a clutch release bearing in contact with a clutch cover assembly at all times

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US (1) US4744450A (en(2012))
JP (1) JPS60256628A (en(2012))
DE (1) DE3518869A1 (en(2012))
FR (1) FR2564921B1 (en(2012))
GB (1) GB2159596B (en(2012))
IT (1) IT1186887B (en(2012))

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4852419A (en) * 1987-03-03 1989-08-01 Sachs Systemtechnik Gmbh Control device, in particular for a motor-vehicle friction clutch
US4995488A (en) * 1989-01-18 1991-02-26 Valeo Control device for a coupling means such as a clutch
US5135090A (en) * 1990-06-29 1992-08-04 Valeo Actuator for a motor vehicle clutch
US5353902A (en) * 1992-06-16 1994-10-11 Dana Corporation Electric actuator assembly for clutch
US6032548A (en) * 1997-08-08 2000-03-07 Del Castillo; Leonardo System and method for creating movement utilizing a servo mechanism with a self-aligning clutch

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4613318A (en) * 1985-08-30 1986-09-23 Canadian Fram Limited Drive system with wear compensator
FR2610261B1 (fr) * 1987-02-03 1989-05-19 Valeo Dispositif de commande d'un moyen d'accouplement tel que par exemple un embrayage, a assemblage perfectionne
FR2610263B1 (fr) * 1987-02-03 1989-05-19 Valeo Dispositif de commande d'un moyen d'accouplement tel que par exemple un embrayage
US4952544A (en) 1987-03-05 1990-08-28 Uop Stable intercalated clays and preparation method
DE19728827A1 (de) * 1997-07-05 1999-01-07 Bosch Gmbh Robert Stellantrieb für eine Fahrzeugkupplung
JP4548141B2 (ja) * 2005-02-15 2010-09-22 トヨタ自動車株式会社 クラッチレリーズ装置
JP4841442B2 (ja) * 2007-01-10 2011-12-21 日野自動車株式会社 クラッチレリーズ機構
JP4979137B2 (ja) * 2008-06-16 2012-07-18 アイシン・エーアイ株式会社 クラッチ操作装置
FR2981418B1 (fr) * 2011-10-14 2014-01-17 Renault Sas Dispositif de commande d'embrayage
DE102012214347A1 (de) * 2012-08-13 2014-02-13 Zf Friedrichshafen Ag Verschleißausgleichendes Betätigungselement für eine Kupplung

Citations (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1869887A (en) * 1929-12-28 1932-08-02 Int Projector Corp Clutch operating mechanism
US2632421A (en) * 1945-12-11 1953-03-24 Gerald S Perkins Eccentric crank linkage
US3286803A (en) * 1964-05-28 1966-11-22 Borg Warner Adjustment mechanism for clutch linkage
FR1469915A (fr) * 1965-03-01 1967-02-17 Borg Warner Embrayages à ressort éloigné
GB1181920A (en) * 1968-12-20 1970-02-18 Ford Motor Co Self-Adjusting Clutch Release Mechanism
FR2094619A5 (en(2012)) * 1970-06-26 1972-02-04 Peugeot & Renault
GB1411467A (en) * 1973-10-27 1975-10-22 Ford Motor Co Self-adjusting clutch mechanism
US4154119A (en) * 1977-05-18 1979-05-15 Chapman Stephen A Linkage device for converting a hydraulic vehicular clutch to mechanical operation
GB2034854A (en) * 1978-11-17 1980-06-11 Start Spa Automatic wear compensation in friction clutches
US4227603A (en) * 1978-11-15 1980-10-14 Start S.P.A. Studi Apparecchiature E Ricerche Tecniche Device for automatic compensation of wear in friction drive clutches of motor vehicles
US4263999A (en) * 1978-12-21 1981-04-28 Start S.P.A. Studi Apparecchiature E Ricerche Devices for the automatic elimination of play in motor vehicle clutches
US4299134A (en) * 1979-11-29 1981-11-10 The J. B. Foote Foundry Co. Resilient mechanism for shifting gears
FR2523743A1 (fr) * 1982-03-18 1983-09-23 Valeo Commande pour un dispositif d'accouplement, tel qu'embrayage, variateur de vitesse, frein ou analogue
GB2117076A (en) * 1982-03-18 1983-10-05 Valeo Control mechanism for a mechanical coupling device
US4428471A (en) * 1982-03-26 1984-01-31 General Motors Corporation Clutch operator with a hydraulic actuator
US4431101A (en) * 1980-04-05 1984-02-14 Fichtel & Sachs Ag Clutch actuating control mechanism
US4650056A (en) * 1984-05-28 1987-03-17 Valeo Power actuator for a machine element such as a clutch
US4671400A (en) * 1984-02-13 1987-06-09 Valeo Wear take-up assembly for the actuating arrangement of a coupling device such as a clutch

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1178316B (de) * 1962-01-23 1964-09-17 Zuendapp Werke Ges Mit Beschra Kupplung fuer Kleinkraftraeder oder Fahrraeder mit Hilfsmotor
JPS54159545A (en) * 1978-06-06 1979-12-17 Nissan Motor Co Ltd Automatic adjusting device for always contact type cable clutch operating mechanism
FR2558551B1 (fr) * 1984-01-25 1989-05-19 Valeo Commande d'embrayage dont les conditions de montage sont ameliorees

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1869887A (en) * 1929-12-28 1932-08-02 Int Projector Corp Clutch operating mechanism
US2632421A (en) * 1945-12-11 1953-03-24 Gerald S Perkins Eccentric crank linkage
US3286803A (en) * 1964-05-28 1966-11-22 Borg Warner Adjustment mechanism for clutch linkage
FR1469915A (fr) * 1965-03-01 1967-02-17 Borg Warner Embrayages à ressort éloigné
GB1124422A (en) * 1965-03-01 1968-08-21 Borg Warner Improvements in or relating to clutches
GB1124421A (en) * 1965-03-01 1968-08-21 Borg Warner Remote spring clutch
GB1181920A (en) * 1968-12-20 1970-02-18 Ford Motor Co Self-Adjusting Clutch Release Mechanism
US3621959A (en) * 1968-12-20 1971-11-23 Ford Motor Co Self-adjusting clutch release mechanism
FR2094619A5 (en(2012)) * 1970-06-26 1972-02-04 Peugeot & Renault
GB1411467A (en) * 1973-10-27 1975-10-22 Ford Motor Co Self-adjusting clutch mechanism
US4154119A (en) * 1977-05-18 1979-05-15 Chapman Stephen A Linkage device for converting a hydraulic vehicular clutch to mechanical operation
US4227603A (en) * 1978-11-15 1980-10-14 Start S.P.A. Studi Apparecchiature E Ricerche Tecniche Device for automatic compensation of wear in friction drive clutches of motor vehicles
GB2034854A (en) * 1978-11-17 1980-06-11 Start Spa Automatic wear compensation in friction clutches
US4263999A (en) * 1978-12-21 1981-04-28 Start S.P.A. Studi Apparecchiature E Ricerche Devices for the automatic elimination of play in motor vehicle clutches
US4299134A (en) * 1979-11-29 1981-11-10 The J. B. Foote Foundry Co. Resilient mechanism for shifting gears
US4431101A (en) * 1980-04-05 1984-02-14 Fichtel & Sachs Ag Clutch actuating control mechanism
FR2523743A1 (fr) * 1982-03-18 1983-09-23 Valeo Commande pour un dispositif d'accouplement, tel qu'embrayage, variateur de vitesse, frein ou analogue
GB2117076A (en) * 1982-03-18 1983-10-05 Valeo Control mechanism for a mechanical coupling device
US4428471A (en) * 1982-03-26 1984-01-31 General Motors Corporation Clutch operator with a hydraulic actuator
US4671400A (en) * 1984-02-13 1987-06-09 Valeo Wear take-up assembly for the actuating arrangement of a coupling device such as a clutch
US4650056A (en) * 1984-05-28 1987-03-17 Valeo Power actuator for a machine element such as a clutch

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4852419A (en) * 1987-03-03 1989-08-01 Sachs Systemtechnik Gmbh Control device, in particular for a motor-vehicle friction clutch
US4995488A (en) * 1989-01-18 1991-02-26 Valeo Control device for a coupling means such as a clutch
US5135090A (en) * 1990-06-29 1992-08-04 Valeo Actuator for a motor vehicle clutch
US5353902A (en) * 1992-06-16 1994-10-11 Dana Corporation Electric actuator assembly for clutch
US6032548A (en) * 1997-08-08 2000-03-07 Del Castillo; Leonardo System and method for creating movement utilizing a servo mechanism with a self-aligning clutch

Also Published As

Publication number Publication date
DE3518869A1 (de) 1985-11-28
IT1186887B (it) 1987-12-16
GB2159596A (en) 1985-12-04
GB8513015D0 (en) 1985-06-26
JPS60256628A (ja) 1985-12-18
DE3518869C2 (en(2012)) 1990-02-08
FR2564921A1 (fr) 1985-11-29
GB2159596B (en) 1987-09-09
JPH048650B2 (en(2012)) 1992-02-17
FR2564921B1 (fr) 1989-06-09
IT8512508A0 (it) 1985-05-27

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